WASHINGTON (CNN) -- A source close to House Speaker Nancy Pelosi now confirms that Pelosi was told in February 2003 by her intelligence aide, Michael Sheehy, that waterboarding was actually used on CIA detainee Abu Zubaydah.

This appears to contradict Pelosi's account that she was never told waterboarding actually happened, only that the administration was considering using it.

Sheehy attended a briefing in which waterboarding was discussed in February 2003, with Rep. Jane Harman, D-California, who took over Pelosi's spot as the ranking Democrat on the House Intelligence Committee.

This source says Pelosi didn't object when she learned that waterboarding was being used because she had not been personally briefed about it -- only her aide had been told.

The source said Pelosi supported a letter that Harman sent to the administration at the time raising concerns. The source asked not to be identified because of the sensitive nature of matters discussed in classified intelligence briefings.

Pelosi admits attending one briefing in September 2002, but at a news conference last month, she was adamant that she did not know waterboarding was used.

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"At that or any other briefing, and that was the only briefing that I was briefed on in that regard, we were not -- I repeat, we were not -- told that waterboarding or any of these other enhanced interrogation methods were used, " Pelosi said on April 23.

Some Republicans have called for Pelosi to testify at congressional hearings.

The number two House Democrat -- Majority Leader Steny Hoyer, D-Maryland -- said Tuesday, "I think the facts need to get out" regarding what members of Congress had been told about harsh interrogations.

But when asked whether Pelosi testifying would be appropriate, Hoyer did not directly answer the question, saying, "The issue is what was done. If you don't have the facts pounded on the table, they (Republicans) are pounding on the table, or they are pounding on Speaker Pelosi. Take your pick. But they are doing so as a distraction, as a distraction from what was done in this case."